Bicycle rack



FIG. 1 is a perspective view of the design;

FIG. 2 is an end elevational view of the design;

FIG. 3 is side elevational view of the design;

FIG. 4 is a top plan view of the design; and,

FIG. 5 is a bottom plan view of the design.

The ornamental design for a bicycle rack, as shown and described.